[ncl-talk] Error when reading ICON data

[Guido Cioni]

Hey mary, I don't know what's going o  but I'm able to open the data with
ncl, convert the data to netcdf with CDO and plot it again with ncl. :-)

Il 6 set 2017 5:29 PM, "Mary Haley" <haley at ucar.edu> ha scritto:

> ​Michael and Guido,
>
> I believe the issue is that NCL doesn't currently handle unstructured data
> in GRIB2 files. We already have a ticket open on this, NCL-2263, and I've
> added your email to the comments, since you provided an excellent source of
> data that we can download for testing.
>
> Guido, I was able to do an ncl_filedump on the file as well, but I got a
> fatal error, and also what looks like incomplete information. Are you
> seeing something different?
>
> fatal:NclGRIB2: Deleting reference to parameter; unable to decode grid
> template 3.101
>
> Variable: f
> Type: file
> filename: ICON_iko_model_level_elements_world_T_2017090512_111
> path: ICON_iko_model_level_elements_world_T_2017090512_111.grib2
>    file global attributes:
>    dimensions:
>       levels0 = 5
>    variables:
>       float levels0_l1 ( levels0 )
>          long_name : unknown
>          units : unknown
>
>       float levels0_l0 ( levels0 )
>          long_name : unknown
>          units : unknown
>
> I am also curious to know if CDO can convert this file to NetCDF...
>
> --Mary
> ​
>
> On Fri, Sep 1, 2017 at 7:35 AM, Guido Cioni <guidocioni at gmail.com> wrote:
>
>> Hey Michael.
>> first of all THANK YOU. I'm working here at the MPI-MET in Hamburg but
>> didn't know at all that the data were freely accessible now. That's
>> amazing!!
>>
>> Second, I think the problem relies in the NCL installation in your
>> system. I just tried to read a data from the link that you provided into
>> NCL (after testing a ncl_filedump command) and everything worked fine. I
>> tried both on my local machine (Macbook) and on our supercomputer (Mistral).
>>
>> I guess you are missing something of the grib api library... Are you able
>> to convert the file into netcdf first via CDO?
>> Cheers
>>
>> On 1. Sep 2017, at 15:19, Michael Langguth <mlangguth at uni-bonn.de> wrote:
>>
>> Dear all,
>>
>> since an amendment in Germany, the German Meteorological Service (DWD)
>> provides free output data access of the global model ICON (see:
>> https://opendata.dwd.de/weather/icon/global/grib/). The data is stored
>> in grib2-files.
>> Unfortunately, NCL seems not be able to handle these grib2-files.
>> Every time, when I try to open the file using the addfile-function, NCL
>> gives the following error message:
>>
>> fatal:NclGRIB2: Deleting reference to parameter; unable to decode grid
>> template 3.101
>>
>> I'm using NCL-version 6.3.0 (on a Linux cluster with openSUSE 42.1), but
>> I've already tested the latest version 6.4.0, too (without success).
>> Is there any way to add the missing grid template and to fix the problem?
>>
>> Example data can be generated by downloading and unpacking an arbitrary
>> file from:
>> https://opendata.dwd.de/weather/icon/global/grib/t/
>>
>> Thanks for your effort and best regards,
>> Michael Langguth
>> _______________________________________________
>> ncl-talk mailing list
>> ncl-talk at ucar.edu
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
>>
>> Guido Cioni
>> http://guidocioni.altervista.org
>>
>>
>> _______________________________________________
>> ncl-talk mailing list
>> ncl-talk at ucar.edu
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20170906/a282f8fd/attachment.html>